Question

7x + 2y=24 8x + 2y=30

Answer 1

Answer:

x=6 y=-9

Step-by-step explanation:

• Layer the equations on each other as you would in a subtraction problem:

               8x + 2y=30

               7x + 2y=24  

• Subtract the equation just like you would normally. This should leave 1x=6 or x=6.
• Now that you have your x value, plug it in as x for one of the equations. For the 2nd equation, this leaves:

               42+2y=24 then

               2y=-18 then

               y=-9

• Double check your y value by plugging x=6 into the first equation. This should also leave y=-9.